Pump.



J. B. FLOYD.

PUMP.

APPLIOATION FILED JANJG, 1912.

Patented Dee. s, A1912.

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No La@ mvENTon ATTORNEYS wnNEssEs UULUMBIA PLANOGIAPM col, WAsmNurON, n. c.

J. B. FLOYD.

PUMP.

APPLICATION FILED JAN.16, 1912.

`1046 167, Patented 1590.3,19122A 2 sHBBTsvsHEET 2.

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WITNESSES ATTURNEYS t @TATES PTENT tlhlhllh.

JOHN B. FLOYD, OF LOS ANGELES, CALIFORNIA.

PUMP.

Application led January 16, 1912.

To @ZZ whom t may concern:

Be it known that l, JOHN B. FLOYD, a citizen of the Unit-ed States, residing in the city and county ot Los Angeles, Stat-e of California, have invented a new and useful lgump, of which the following is a specification.

My invention consists of a novel construction ut a pump, whereby I am enabled to obtain a better vacuum than heretofore, means being provided for the employment of a plurality ot pistons having connections therefrom to upper and lower cross-heads, said cross-heads being joined by rods, having ports therein, arranged out of alinement and adapted to register with passages leading to the interior ot' the piston chamber.

1t further consists of a novel construction of upper and lower piston rods, having a passage therethrough, a port at one end of said passage communicating with the inte- 'rior of the piston chamber, and a valve seat at the opposite end adapted to co-act with novel valve mechanism, for the purpose ot' obtaining the desired vacuum.

1t further consists ot other novel eatures of construction, all as will be hereinafter fully set torth.

Figure 1 represents a side elevation of a pump embodying my invention. Fig. 2 represents a vertical sectional view of the same,

ertain of the parts being in elevation, showing the position they assume when the pistons are in their extreme or lowest position. Fig. 3 represents a longitudinal sectional view, somewhat similar to Figp2, showing the position the parts assume, when the pistons are in their highest or uppermost position. Fig. 4 represents a side elevation, 'partly in section of a portion of the valve mechanism, carried at the upper extremity of the upper piston rod, showing the position the parts assume when the valve is unseated. F ig. 5 represents a view similar to Fig. 4, but showing the position the parts assume when the valve is seated. Fig. 6 represents a longitudinal sectional view oi the upper piston rod in det-ached position. Fig. Y represents a sectional view of the lower piston rod in detached position.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings -1 designates Specification of Letters Patent.

1atentedA Bec. 3, 1912.

Serial No. 671,424.

the pump cylinder, having the upper head 2, provided with the stutling box 3, of any conventional type, through which the piston rod 4 passes, said piston rod being connected at its lower end to the upper piston 5, contained in the cylinder 1. The upper end of the rod 4 is secured in the upper cross-head 15 by means of the nuts 7, said rod 4 being hollow, as indicated at 8, and having the port 9 located near the piston 5, and adapted to communicate with the upper piston chamber 10, when the parts are in the position seen in Fig. 2. The hollow piston rod 4 after passing through the cross-head 15 passes through the head 11, having the journals 12 to which are attached the connecting rods 13, which may communicate with any suitable source of power, whereby the desired reciprocating movement may be imparted to the rod 4, piston 5, cross-head 15 and their adjuncts. The head 11 is bored so as to snugly tit the rod 4, and the latter is secured in position by the set screw 62 or other fastening devices. The passage S through the rod 4 communicates at its lower end by the port 9, located near the piston 5 lwith the chamber 10, as stated while the upper end of said passage 8 terminates in the valve seat 14, located within the cylinder 16.

17 and 18 designate two outer rods, having their upper ends secured in the upper cross-head 15 by the nuts 19 and 20 or their equivalents, respectively, while their lower ends are secured in the lower bar or crosshead 21, by the nuts 22 and 23 or their equivalents.

24 designates a port in the rod 1T, communicating with the passage 25, which has the pipe 26 leading thereto.

27 designates a port in the rod 18, which is adapted to register with or control the passage 28, leading into the cylinder 1, said passage having a pipe 29 communicating therewith.

8O designates the lower piston, which has the upper end of the piston rod 31 connected therewith, the lower end ot said rod passing through the cross-head 21 and being secured with respect thereto by the tastening devices 32.

33 designates a port in the rod 31 located near the piston 30 and communicating with the passage 34 in said rod 31, the lower end of said passage 34 terminating in the valve seat 35, within the cylinder 36.

37 designates a boss on one side of the cylinder 1, through which the rod 18 passes, said rod being packed by the Vstuiiing boxes 38 and 39. 40 designates a boss on the opposite side of the cylinder 1, through which the rod 17 passes and is guided, said rod being packed by the stuiiing boxes 41 and 42. li preferably provide the piston with the leather cup 43, which is held in place by the plate 44 againstl the cup shaped body 45 of the piston 5.

46 designates a leather cup on the lower piston said ycup being held in position against the cup shaped body 47 of the piston 30 by means of the plate 48.

The body portions and 47 of the pistons 5 and 30, respectively, are preferably cup shaped in cross section, as will be understood from Fig. 2, and contact with their respective leather cups as will be understood from said Fig. 2, suitable spring packing being employed to force the cups 46 and 43 into contact with the inner bore of the cylinder 1.

Bars, 49, are secured on opposite sides of the cylinders 16 and 36, by pins 59, both being alike, and said bars have slots, 50, in their ends, in which slots slide pins, 51, to

v which the ends of pairs of outer links, 52,

and inner links, 58, are pivoted. The inner ends of the inner links are pivotally connected t-o a pin, 54, secured through a plunger, 55, sliding in the cylinder, and said plunger terminates in a tapering valve, 56, litting -the valve-seat in the end of the piston-rod. The outer ends of the outer links are pivoted upon a pin, 57, against which a spring, 58, bears, which spring is fitted in the outer end of the cylinder. The valve is illustrated as open in Fig. 4 and as seated in Fig. 5. The cylinder has one or more ports, 60, above the seat, to admit of air escaping when the valve is open. lt will be understood that the cylinder has longitudr nal slots 61 in its sides for the pin 54 to slide in.

It will be seen that as the head 11 is reciproeated by means of the links or connecting rods 13, the pistons 5 and 30 will reciprecate in unison and that the cross-heads 15 and 21 and the rods 17 and 18 common thereto will also be reciprocated in unison, so that the ports 24 and 27 will alternately register with the passages 25 and 28, which are in communication with the pipes 26 and 29, respectively. The rods 17 and 18 are preferably held in desired position with respect to their cross heads 15 and 21 by means o-f the nuts 19 and 20, 22 and 23, whereby the desired adjustment can be readily effected in regard to the piston rods 4 and 31 wit-hout necessitating the dismantling of the pump or its principal working parts, whereby the extent of throttling the ports 25 and 28 can be readily adjusted or eli'ected.

lt willvbe apparent that in place of employing a plurality of piston rods, as 4 and 31, as shown, l may employa single piston rod common to both pistons, it being of course essential that, in case such single rod is employed, the portion of the rod between the pistons 5 and 30 would be solid, it being apparent that there is always va space between the two pistons 5 and 30, as will be understood from Figs. 2 and 3. By making the corresponding parts of the pistons and the rods 17 and 18 and the cross-heads 15 and 21 of substantially the same size or diameter, it will be apparent that they may be interchangeable and will work on either end or either side so that they may be readily interchanged if desired. The rods 17 and 18 lit snugly in their respective stung boxes so that all leakage is prevented.

lVhen the piston-rod and laterall rods 17 and 18 are reciprocated within the cylinder, one compressing and expelling air, while the other is creating a vacuum or suction, the inlet-ports, 25 and 28, and their pipes, 26 and 29, are connected'to whatever kchamber or receptacle in which it is desired to create a vacuum. When each piston makes an inward stroke,vthe valve in its rod is closed, and the piston creates a substantial vacuum in its end of the cylinder. When now the piston passes the inlet ports, one of the lateral rods has its po-rt registering with one of said ports, and suction is createdk through such ports from the chamber or receptacle, drawing air or Vwhatever other' fluid therein, into the cylinder. 0n the outstroke of the piston, this air or fluid is compressed and expelled through the hollow piston-rod and the exhaust-valve. As soon as the stroke is reversed, the spring closes the valve, and the vacuum stroke is repeated. By having two pistons connected to coperate, practically continuous suction is produced, if the inlet-pipes are connected to the same chamber or other source, and owing to the construction of the pistons and their arrangement in the cylinder, substantially all air will be expelled at each outstroke of a piston and, consequently, a substantially perfect vacuum will be created by each in-stroke of a piston.

Oil is illed into the space between the two pistons to lubricate the cylinder and pistons, and cannot escape from the cylinder as the intake ports of the same are closed by the lateral valve-rods when the space between the piston registers with such intake ports.

The ports in the hollow piston-rods and near the pistons enter the stuing boxes at Y the ends of the out-strokes of the pistons,

I claim as new and desire to secure by Letters Patent, is

l. In a pump, a cylinder formed with inlet passages in its sides, valves in said passages to control the same, a plurality of pistons in said cylinder, hollow piston-rods having ports at their connection with the pistons and having their outer ends extending beyond the cylinder, outwardly opening valves at such outer ends of the piston-rods,

and means connected to said piston-rods and.

to the inlet-valves to actuate the latter.

2. In a pump, a plurality of upper and lower pistons, hollow piston rods therefor, cross-heads at each end of said rods to which the latter are secured, rods connecting the ends of said cross-heads and having ports therein and controlling passages leading to said cylinder, valve seats on the ends of said piston rods and valve mechanisms for said valve seats.

3. In a. pump, a cylinder` having bosses on the sides thereof and having passages therethrough, apertured rods passing through said bosses, stuiiing boxes for the latter, a plurality of pistons in said cylinder, hollow piston rods for said pistons, connections from said piston rods to said apertured rods, a valve seat on the end of each of said piston rods, and valve mechanisms for said valve seats.

4. In a pump, a cylinder having ports leading thereinto on opposite sides thereof, a plurality of pistons in said cylinder, hollow piston rods for said pistons, valve seats in the extremity of said piston rods, valve mechanisms for said seats, cross-heads for said piston rods, the latter having ports leading to the interior of said cylinder, and external rods connecting said cross-heads, and having ports therein.

5. In a pump, a cylinder having valve controlled passages in the sides thereof, a plurality of imperforate pistons, hollow piston rods therefor having closed inner ends, ports at their connection with said pistons and opening into said cylinder, outwardly opening valves in the outer ends of said hollow piston-reds, cross-heads at each end of said cylinder, and fastening devices for securing said cross-heads to said piston rods.

6. In a pump, a cylinder, a plurality of pistons therein, a hollow piston rod connected to one of said pistons and projecting upwardly therefrom, an upper cross-hea through which said rod passes and to which it is secured, a head secured to said rod, actuating devices for said head and rod, the upper portion of said rod terminating in a valve seat and the lower portion of said rod having a port leading to the interior of said cylinder, a hollow piston rod connected to the other of said pistons, a cross-head to which said rod is secured, rods common to said cross-heads and having ports therein controlling passages leading to said cylinder, a valve seat in the lower end'of said last mentioned piston-rod, and valvey mechanisms for the valve seats at the extremities of said piston rods.

7. In a pump, a cylinder ,having an intake port at a distance from its end, an imperforate piston in said cylinder, a hollow pistonrod having a closed inner end and formed with an opening at its connection with the piston, an outwardly opening valve in the cuter end of said piston-rod, and means for reciprocating said piston-rod and piston.

8. In a pump, a cylinder having an intake port at a distance from its end, an imperforate piston in said cylinder, a hollow pistonrod having a closed inner end and formed with an opening at its connection with the piston, and an outwardly opening valve in the outer end of said piston-rod.

9. In a pump, a cylinder provided with a stuffing-box in one head and having an intake port at a distance from such head, a piston in said cylinder, a hollow piston-rod formed with an opening .near the face of said piston and at a distance from the same to enter the stuihng-box at the extreme of the out-stroke of the piston, and an outwardly opening valve at the outer end of the piston-rod.

10. In a pump, a cylinder provided with a head having a flush inner face and a stuffing-box in said head and also provided with an intake-port at a distance from such head, av piston in said cylinder and having a flush face, a hollow piston-rod slidable in the stutling-box and having an opening at a distance from the face of the piston sufficient to admit of its entering the stuffing-box at the eXtreme of the out-stroke of the piston, and an outwardly opening valve at the outer end of the piston-rod.

l1. In a pump, a cylinder provided with a head having a stuiiing-boX and with a boss at a distance from said head formed with an intake-port, a piston in said cylinder, a hollow piston-rod slidable in the stuffing-box and having an opening near the face of the piston, an outwardly opening valve at the outer end of the piston-rod, a rod having a port and guided to traverse and register with the intake-port in the boss, and means for reciprocating the piston-rod and said opening Valveat the outer end of said pislatter rod in unison. ton-rod, and means for jointly loperating the 10 12. In a pump, a. cylinder having an inpiston-rod and'the valve-control.

take-port at a distance from its end, va1vef JOHN B FLOYD i control for such port, an imperforate piston in said cylinder, zt hollow piston rod having =Witnessesz a Closed inner end and formed With an open- WV. H. KINDIG, ing near the face of the piston, an outwardly A. H. WEBER.

Copies of this patent may be obtained for'ive cents each, by addressing the Commissioner of Patentsvi Washington, D. C. 

